This circuit is from documentation from 1965. However, it can be created with modern transistors. Power comes from two 9 V batteries.
This circuit can be used as a shield for transmitting the temperature of a sensor. The circuit is from...
This simple circuit can make use of any general-purpose transistor. The power comes from the...
The circuit shown in the figure is suggested by Maxim (www.maxim-ic.com) and makes use of the...